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MCQs

Total Questions : 37 | Page 2 of 4 pages
Question 11. Emitter follower is used for ___________
  1.     Current gain
  2.     Impedance matching
  3.     Voltage gain
  4.     None of the above
 Discuss Question
Answer: Option B. ->  Impedance matching
Question 12. When current feedback (negative) is applied to an amplifier, its output impedance
  1.     Is increased
  2.     Is decreased
  3.     Remains the same
  4.     None of the above
 Discuss Question
Answer: Option A. ->  Is increased
Question 13. Emitter follower is a ___________ circuit
  1.     Voltage feedback
  2.     Current feedback
  3.     Both voltage and current feedback
  4.     None of the above
 Discuss Question
Answer: Option A. ->  Voltage feedback
Question 14. An emitter follower has ___________ input impedance
  1.     Zero
  2.     Low
  3.     High
  4.     None of the above
 Discuss Question
Answer: Option C. ->  High
Question 15. If the output of an amplifier is 10 v and 100 mv from the output is fed back to the input, then feedback fraction is ___________
  1.     10
  2.     1
  3.     1
  4.     15
 Discuss Question
Answer: Option C. ->  1
Question 16. When current feedback (negative) is applied to an amplifier, its input impedance ___________
  1.     Is decreased
  2.     Is increased
  3.     Remains the same
  4.     None of the above
 Discuss Question
Answer: Option A. ->  Is decreased
Question 17. If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately___________
  1.     500
  2.     100
  3.     1000
  4.     5000
 Discuss Question
Answer: Option B. ->  100
Question 18. When voltage feedback (negative) is applied to an amplifier, its input impedance ___________
  1.     Is decreased
  2.     Is increased
  3.     Remains the same
  4.     None of the above
 Discuss Question
Answer: Option B. ->  Is increased
Question 19. The output impedance of an emitter follower is______________?
  1.    High
  2.    Very high
  3.    Almost zero
  4.    Low
 Discuss Question
Answer: Option D. -> Low
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 20. If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately________________?
  1.    500
  2.    100
  3.    1000
  4.    5000
 Discuss Question
Answer: Option B. -> 100
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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